Portion of a door phone



FIG. 1 is a front view of a first embodiment of a portion of a door phone illustrating my new design;

FIG. 2 is a front view of a second embodiment of the portion of a door phone;

FIG. 3 is another front view of the first embodiment of the portion of a door phone coupled to an optional door environment; and,

FIG. 4 is another front view of the second embodiment of the portion of a door phone coupled to an optional door environment.

Broken lines illustrate an optional environment that forms no part of the claimed design. 

CLAIM The ornamental design for a portion of a door phone, as shown and described. 